During the demolition and subsurface structure removal activities, the demolition contractor encountered a subsurface vault that contained oil-soaked soil as well as areas of oily metallic slag and burn pit ash materials. In June 2016, McAlister GeoScience was contacted to perform a site inspection and determine the proper environmental monitoring and profiling of the oily/ash slag materials as well as other potential environmental impact areas within the Subject Property. A profile sample was collected from the stockpile of the oily / ash slag material to determine if the material had any elevated containments above the local and state regulatory standards for industrial/commercial properties. The soil sample reported elevated concentrations of total petroleum hydrocarbons (TPH) and total lead.
Based on review of historical documents and the site inspection and monitoring efforts, a total of seven areas of concern (AOCs) were identified and managed as part of this remedial action. The seven AOCs were located in the central and eastern portion of the Subject Property.